70 }
  71 
  72 void JfrPostBox::post(JFR_Msg msg) {
  73   const int the_message = MSGBIT(msg);
  74   if (is_thread_lock_aversive()) {
  75     deposit(the_message);
  76     return;
  77   }
  78   if (!is_synchronous(the_message)) {
  79     asynchronous_post(the_message);
  80     return;
  81   }
  82   synchronous_post(the_message);
  83 }
  84 
  85 void JfrPostBox::deposit(int new_messages) {
  86   while (true) {
  87     const int current_msgs = Atomic::load(&_messages);
  88     // OR the new message
  89     const int exchange_value = current_msgs | new_messages;
  90     const int result = Atomic::cmpxchg(exchange_value, &_messages, current_msgs);
  91     if (result == current_msgs) {
  92       return;
  93     }
  94     /* Some other thread just set exactly what this thread wanted */
  95     if ((result & new_messages) == new_messages) {
  96       return;
  97     }
  98   }
  99 }
 100 
 101 void JfrPostBox::asynchronous_post(int msg) {
 102   assert(!is_synchronous(msg), "invariant");
 103   deposit(msg);
 104   JfrMonitorTryLock try_msg_lock(JfrMsg_lock);
 105   if (try_msg_lock.acquired()) {
 106     JfrMsg_lock->notify_all();
 107   }
 108 }
 109 
 110 void JfrPostBox::synchronous_post(int msg) {

  70 }
  71 
  72 void JfrPostBox::post(JFR_Msg msg) {
  73   const int the_message = MSGBIT(msg);
  74   if (is_thread_lock_aversive()) {
  75     deposit(the_message);
  76     return;
  77   }
  78   if (!is_synchronous(the_message)) {
  79     asynchronous_post(the_message);
  80     return;
  81   }
  82   synchronous_post(the_message);
  83 }
  84 
  85 void JfrPostBox::deposit(int new_messages) {
  86   while (true) {
  87     const int current_msgs = Atomic::load(&_messages);
  88     // OR the new message
  89     const int exchange_value = current_msgs | new_messages;
  90     const int result = Atomic::cmpxchg(&_messages, current_msgs, exchange_value);
  91     if (result == current_msgs) {
  92       return;
  93     }
  94     /* Some other thread just set exactly what this thread wanted */
  95     if ((result & new_messages) == new_messages) {
  96       return;
  97     }
  98   }
  99 }
 100 
 101 void JfrPostBox::asynchronous_post(int msg) {
 102   assert(!is_synchronous(msg), "invariant");
 103   deposit(msg);
 104   JfrMonitorTryLock try_msg_lock(JfrMsg_lock);
 105   if (try_msg_lock.acquired()) {
 106     JfrMsg_lock->notify_all();
 107   }
 108 }
 109 
 110 void JfrPostBox::synchronous_post(int msg) {